Strategies for the Targeted Improvement of Anodic Electron Transfer in Microbial Fuel Cells

Heydorn, Raymond Leopold; Engel, Christina; Krull, Rainer; Dohnt, Katrin

doi:10.1002/cben.201900023

Cited by 22 publications

(10 citation statements)

References 134 publications

(170 reference statements)

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“…3) indicated that ANME seemed to be a weak electricigen in comparison to strong counterparts such as Geobacter [33]. Use of mediators is suggested as an effective method to improve the EET kinetics of weak electricigen [33], which has been intensively confirmed to enhance performance of BESs with different strains as biocatalysts [34,35]. This is proved to be applicable to ANME as well in the current study.…”

Section: Discussionmentioning

confidence: 52%

Enhancing methane oxidation in a bioelectrochemical membrane reactor using a soluble electron mediator

Zhang

Rabiee

Frank

et al. 2020

Biotechnol Biofuels

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Background Bioelectrochemical methane oxidation catalysed by anaerobic methanotrophic archaea (ANME) is constrained by limited methane bioavailability as well as by slow kinetics of extracellular electron transfer (EET) of ANME. In this study, we tested a combination of two strategies to improve the performance of methane-driven bioelectrochemical systems that includes (1) the use of hollow fibre membranes (HFMs) for efficient methane delivery to the ANME organisms and (2) the amendment of ferricyanide, an effective soluble redox mediator, to the liquid medium to enable electrochemical bridging between the ANME organisms and the anode, as well as to promote EET kinetics of ANME. Results The combined use of HFMs and the soluble mediator increased the performance of ANME-based bioelectrochemical methane oxidation, enabling the delivery of up to 196 mA m−2, thereby outperforming the control system by 244 times when HFMs were pressurized at 1.6 bar. Conclusions Improving methane delivery and EET are critical to enhance the performance of bioelectrochemical methane oxidation. This work demonstrates that by process engineering optimization, energy recovery from methane through its direct oxidation at relevant rates is feasible.

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Section: Discussionmentioning

confidence: 52%

Enhancing methane oxidation in a bioelectrochemical membrane reactor using a soluble electron mediator

Zhang

Rabiee

Frank

et al. 2020

Biotechnol Biofuels

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“…The overexpression of redox mediators like pyocyanin by P. aeruginosa can enhance the EET in addition to nanowires. P. aeruginosa's biosynthesis pathway was genetically altered, leading to an increase in power density by four times and a 1.6-fold increase in pyocyanin concentration [114]. Additionally, overexpressing NAD synthase in P. aeruginosa increased the quantity of intracellular NAD+/NADH readily available, which boosted the production of pyocyanin by a factor of 1.5 and the power density by a factor of 3 [115].…”

Section: Overexpression Of Electron-conducting Proteinsmentioning

confidence: 99%

Recent advances in biological approaches towards anode biofilm engineering for improvement of extracellular electron transfer in microbial fuel cells

Naaz¹,

Kumar²,

Vempaty³

et al. 2023

Environmental Engineering Research

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Over the last two decades, scientific communities have been more interested in turning organic waste materials into bioenergy. Microbial fuel cells (MFC) can degrade organic wastewater and produce electrical power. Many constraints have limited the development of MFC. Among them, the anode biofilm development is one of the significant constraints that need to be improved. This review delineates the role of various biological components in the development of electroactive biofilm. The current article focuses on the numerous electron exchange methods for microbiome-induced electron transfer activity, the different proteins, and secretory chemicals involved in electron transfer. This study also focuses on several proteomics and genomics methodologies that have been adopted and developed to improve the extra electron transfer mechanism in electroactive bacteria. Recent advances and publications on synthetic biology and genetic engineering in investigating the direct and indirect electron transport phenomena have also been highlighted. This review helps the reader to understand the recent development in the genetic manipulations of the biofilm, electrode material modifications, EET mechanisms, and operational strategies for improving anode performance. This review also discusses the challenges in present technology and the future direction for improving biofilm production at the anode.

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“…Conjugated or composite materials have also been shown to improve the performance of microbial electrochemical devices nowadays, which has led to advancement in this field with the aim of designing new materials [132]. Such aims have often been based on composite (metals/oxides/carbon-based) or conjugated (polymers, layer-by-layer structures) materials, mainly to exploit the interactions between carbons, polymers, and the particular organism [133].…”

Section: Metal Oxide and Metal-based Materialsmentioning

confidence: 99%

Sustainable Syntheses and Sources of Nanomaterials for Microbial Fuel/Electrolysis Cell Applications: An Overview of Recent Progress

et al. 2021

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The use of microbial fuel cells (MFCs) is quickly spreading in the fields of bioenergy generation and wastewater treatment, as well as in the biosynthesis of valuable compounds for microbial electrolysis cells (MECs). MFCs and MECs have not been able to penetrate the market as economic feasibility is lost when their performances are boosted by nanomaterials. The nanoparticles used to realize or decorate the components (electrodes or the membrane) have expensive processing, purification, and raw resource costs. In recent decades, many studies have approached the problem of finding green synthesis routes and cheap sources for the most common nanoparticles employed in MFCs and MECs. These nanoparticles are essentially made of carbon, noble metals, and non-noble metals, together with a few other few doping elements. In this review, the most recent findings regarding the sustainable preparation of nanoparticles, in terms of syntheses and sources, are collected, commented, and proposed for applications in MFC and MEC devices. The use of naturally occurring, recycled, and alternative raw materials for nanoparticle synthesis is showcased in detail here. Several examples of how these naturally derived or sustainable nanoparticles have been employed in microbial devices are also examined. The results demonstrate that this approach is valuable and could represent a solid alternative to the expensive use of commercial nanoparticles.

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Strategies for the Targeted Improvement of Anodic Electron Transfer in Microbial Fuel Cells

Cited by 22 publications

References 134 publications

Enhancing methane oxidation in a bioelectrochemical membrane reactor using a soluble electron mediator

Enhancing methane oxidation in a bioelectrochemical membrane reactor using a soluble electron mediator

Recent advances in biological approaches towards anode biofilm engineering for improvement of extracellular electron transfer in microbial fuel cells

Sustainable Syntheses and Sources of Nanomaterials for Microbial Fuel/Electrolysis Cell Applications: An Overview of Recent Progress

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